Roll Map for Electrode Coating Process and Roll Map Creation Method and System

ABSTRACT

A roll map of an electrode coating process includes a roll map bar and a representation part. The roll map bar is displayed on a screen in synchronization with movement of an electrode between an unwinder and a rewinder while being coated with an electrode slurry in a roll-to-roll state. The roll map bar is displayed in the form of a bar by simulating the electrode in the roll-to-roll state. The representation part is configured to visually show either one of or both quality-related and defect-related acquired data associated with the electrode coating process. The acquired data is shown at a certain location on the roll map bar corresponding to a location in the electrode at which the data is measured. A roll map of an electrode coating process is generated by a process. A roll map of an electrode coating process is generated by a system.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a national phase entry under 35 U.S.C. § 371of International Application No. PCT/KR2022/003446 filed on Mar. 11,2022, which claims priority from Korean Patent Application No.10-2021-0039801 filed on Mar. 26, 2021, all of which are herebyincorporated herein by reference in their entireties.

FIELD

The present invention relates to a roll map of an electrode coatingprocess and a method of generating the roll map. More specifically, thepresent invention relates to a roll map of an electrode coating process,which allows understanding of quality and defect information of theelectrode coating process at a glance by visualizing data on quality ordefects measured by various measuring instruments in the electrodecoating process on the roll map that simulates an electrode shape, and amethod of generating the roll map.

Also, the present invention relates to a system for generating a rollmap of an electrode coating process.

BACKGROUND

With the technological development of mobile devices and an increase indemand for mobile devices, the demand for secondary batteries is alsorapidly increasing. Among secondary batteries, a lithium secondarybattery is widely used as an energy source for various electronicproducts as well as various mobile devices because the lithium secondarybattery has a high energy density and operating voltage and excellentpreservation and lifetime characteristics.

The so-called electrode process for manufacturing an electrode of alithium secondary battery includes a coating process of forming apositive electrode and a negative electrode by coating the surface of ametal electrode plate, which is a current collector, with an activematerial and a certain insulating material, a roll pressing process ofrolling the coated electrode, and a slitting process of cutting therolled electrode according to the dimension.

In the electrode manufactured in the electrode process, an electrode tabis formed through a notching process. Then, the form of a secondarybattery is made through an assembly process of interposing a separatorbetween the anode and the cathode to form an electrode assembly,stacking or folding the electrode assembly to package it in a pouch,can, etc. and injecting an electrolyte. After that, the assembledsecondary battery undergoes an activation process of imparting batterycharacteristics by charging and discharging the secondary battery andbecomes a final secondary battery as a finished product.

When an inspection device detects a foreign material mixed in the activematerial layer or a poor coating part in the electrode coating process,according to the conventional art, it is marked on the electrode or anoperator attaches a defect badge to the electrode such that defectiveparts can be removed in the coating process or a follow-up process (seePatent Document 1).

However, in the case of marking directly on an electrode, it isdifficult to mark a coated part of the electrode, and thus there is nochoice but to mark a non-coated part. Therefore, for example, when anappearance defect occurs in the coated part, a marking is made on thenon-coated part rather than the coated part having the actual defect,and thus it is difficult to display the exact location of a fault ordefect. In addition, Patent Document 1 employs a physical markingprocess of directly marking an electrode with information related toquality, defects, etc. Accordingly, once a secondary battery ismanufactured with electrodes, even when a defect occurs in a follow-upprocess due to a defect caused in the electrode process, it is difficultto find the section of the electrode process in which the defect wasactually caused. In other words, after a physically marked electrode isused for assembly or disappears, it is very difficult to analyze thequality correlation between the electrode process or the electrodecoating process and a follow-up process.

Meanwhile, a technology for marking whether there is a defect with inkdirectly on a corresponding secondary battery in a secondary batteryassembly line after an electrode process is completed so that a workhistory can be checked in units of secondary batteries has been proposed(see Patent Document 2).

Since the above conventional art relates to marking after assembly of asecondary battery, it is possible to check a secondary battery assemblyprocess and a subsequent history. However, it is not possible to checkhistory information about defects and the like in an electrode coatingprocess which is a previous process. In other words, Patent Document 2relates to a technology for physically marking a secondary batteryduring or after secondary battery assembly and thus is unrelated to theproduct history of quality and defects in an electrode coating process.Accordingly, it is likewise not possible to analyze the qualityrelationship between an electrode process and an assembly process.

In addition, neither of the above patent documents provides non-defectinformation, for example, information on the amount of loading,dimensions, a width, etc. in the electrode process. For example, theremay be no defect in an electrode coating process, but a defect such as afire or the like may occur in a follow-up process or a process of usingthe secondary battery. In this case, it is necessary to find the causeof the defect by retracing the product history of the battery up to theelectrode coating process, but with the technologies proposed in theabove-described patent documents, it is not possible to find the cause.

Consequently, to find the cause of a defect occurring in a follow-upprocess or after the assembly process of a secondary battery, it isrequired to develop a technology for displaying or preserving historyinformation of quality or defects in an electrode coating process whichallows quality relationship analysis in a relationship with a follow-upprocess.

PRIOR ART DOCUMENTS

(Patent Document 1) Japanese Patent Application Publication No.2015-2149 (Jan. 5, 2015)

(Patent Document 2) Korean Patent Publication No. 10-1731983 (May 2,2017)

SUMMARY OF THE INVENTION

The present invention has been made to solve the above problems, anobject of the present invention is to provide a roll map of an electrodecoating process, which allows understanding of quality and defectinformation in the electrode coating process at a glance by visualizingquality-related or defect-related data of the electrode coating processon the roll map that simulates an electrode shape, and a method ofgenerating the roll map.

Another object of the present invention is to provide a system forgenerating a roll map of an electrode coating process.

A roll map of an electrode coating process according to the presentinvention in order to solve above problems includes: a roll map bar thatis displayed on a screen in synchronization with movement of anelectrode, which is coated with electrode slurry while moving between anunwinder and a rewinder, in a roll-to-roll state and is displayed in theform of a bar by simulating the electrode in the roll-to-roll state; anda representation part configured to visually show at least one ofquality-related and defect-related data measured in the electrodecoating process at a predetermined location on the roll map barcorresponding to a location in the electrode at which the data ismeasured.

As an example, a longitudinal dimension of the electrode may bedisplayed at predetermined intervals in a longitudinal direction of theroll map bar.

As a specific example, a detailed data including a lot number of theelectrode installed between the unwinder and the rewinder in theroll-to-roll state may be displayed together with the roll map bar.

Specifically, the at least one of the quality-related and defect-relateddata may be measured by a predetermined measuring instrument or operatorand then displayed.

As a specific example, the quality-related or defect-related data maybe 1) data on at least one of electrode dimensions and width, 2) data ona mismatch between a coated electrode part and non-coated electrodepart, 3) electrode slurry loading amount data, 4) electrode appearancedefect data, 5) data on the location of a disconnected section orinter-electrode connection, 6) data on a location of a sampleexamination unit, 7) data on an electrode discard section, 8) data oninsulating quality or defects in an insulating material coating processperformed after electrode slurry coating, and 9) other defect data.

As an example, when a specific range of the roll map bar on the screenis specified and clicked, at least one of the quality-related anddefect-related data in a range on the electrode corresponding to thespecific range may be visually displayed on the screen separately fromthe roll map bar.

As another example, when the electrode appearance defect data on theroll map bar is clicked, an appearance image of the electrodephotographed by an appearance inspection device may be visuallydisplayed on the screen separately from the roll map bar.

As a specific example, when the appearance image is displayed, detailedinformation including location coordinates of an appearance defectphotographed by the appearance inspection device may be displayedtogether with the external image.

As an example, the roll map may be displayed on the screen for each laneon the electrode where the electrode slurry is coated.

As another example, when the electrode is a double-sided electrode, rollmaps for a top surface and a bottom surface of the double-sidedelectrode may be displayed on the same screen.

As another example, at least one of data on a input status of electrodefoil, the electrode slurry, and an insulating material input to theelectrode coating process and data on a loading amount of the electrodeslurry input to the electrode coating process may be visually displayedon the screen in parallel with the roll map in a longitudinal directionof the roll map.

As another aspect of the present invention, a method of generating aroll map of an electrode coating process includes: acquiring at leastone of quality-related data and defect-related data in the electrodecoating process by inspecting an electrode coating process of coating anelectrode slurry on an electrode that is moved between the unwinder andthe rewinder in a roll-to-roll state; transmitting the acquired data toa server together with data on a location in the electrode at which thedata is acquired; and displaying, by a data processing systeminterconnecting with the server, a roll map bar having a bar shape whichsimulates an electrode in the roll-to-roll state on a screen insynchronization with movement of the electrode between the unwinder andthe rewinder and visually displaying the at least one of thequality-related and defect-related data of the electrode coating processat a certain location on the roll map bar corresponding to the data onthe location in the electrode.

As an example, the method may further include, when an electrode roll isinstalled in the roll-to-roll state between the unwinder and therewinder before the electrode coating process, an electrode rollinformation registration operation of inputting detailed data includinga lot number of the electrode to the server is preceded, and thedetailed data may be displayed on the screen together with a roll map.

As another example, the at least one of the quality-related anddefect-related data may be acquired when a predetermined measuringinstrument or operator inspects the electrode coating process, and thedata acquired by the operator may be transmitted to the server by amanual input of the operator.

As a specific example, the predetermined measuring instrument may be atleast one of an electrode slurry loading amount measuring instrument, adimension and width measuring instrument, and an appearance inspectiondevice.

As an example, location data based on a longitudinal direction of theelectrode may be detected by an encoder installed on the unwinder or therewinder.

As a more specific example, location data based on a width direction ofthe electrode may be detected by a predetermined measuring instrumentwhich checks the electrode coating process.

As an example, the method may further include: the quality-related dataor the defect-related data may be compared with quality data stored in adatabase installed in a data processing system or installed tointerconnect with the data processing system, and the quality-relateddata or defect-related data which is determined to deviate from normalquality data as a result of the comparison may be marked on the roll mapbar to be visually distinguished from other parts.

As another example, the method may further include: visually displayingat least one of data on a current input status of electrode foil, theelectrode slurry, and an insulating material input to the electrodecoating process and data on a loading amount of the electrode slurryinput to the electrode coating process on the screen in parallel withthe roll map in a longitudinal direction of the roll map.

As still another aspect of the present invention, a system forgenerating a roll map of an electrode coating process comprises: ameasuring device configured to inspect an electrode coating process,acquire at least one of quality-related data and defect-related data ofthe electrode coating process, and transmit the acquired data to aserver together with data on a location in an electrode at which thedata is acquired; the server configured to store the data received fromthe measuring device; a data processing system configured tointerconnect with the server to display a roll map bar having a barshape simulating an electrode in a roll-to-roll state in synchronizationwith movement of the electrode between an unwinder and a rewinder, andto generate a role map on the basis of the quality-related ordefect-related data received from the server and the data on thelocation in the electrode at which the data is acquired, wherein theroll map visually displays the at least one of the quality-related anddefect-related data at a certain location on the roll map barcorresponding to the data on the location in the electrode; and adisplay unit connected to the data processing system and configured todisplay the roll map on a screen.

According to the present invention, quality-related or defect-relateddata can be displayed on a roll map bar which is shown to simulate aroll-to-roll state on a screen, and thus it is possible to easilyvisually understand quality-related or defect-related data of anelectrode coating process at a glance.

Also, according to the present invention, an electrode or secondarybattery is not directly marked, and quality-related or defect-relateddata is displayed on a roll map bar shown on a screen. Accordingly, itis possible to accurately display quality-related or defect-related datain a coated part as well as a non-coated part.

Further, an electrode or battery is not directly marked, and data isdisplayed in a roll map on a screen. Accordingly, even when an electrodeis used for assembly or a battery is manufactured with the electrode ina follow-up process, it is possible to easily find the cause of apost-assembly fault or defect from the roll map data of thecorresponding electrode as long as the lot number of the battery orelectrode is known. Therefore, it is possible to carry out inter-processquality relationship analysis with high accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram illustrating a change in risk rangeaccording to the quality relationship analysis between an electrodeprocess and a final product.

FIG. 2 is a diagram illustrating a roll map of an electrode coatingprocess according to an embodiment.

FIG. 3 is a diagram illustrating a roll map of an electrode coatingprocess according to another embodiment.

FIG. 4 is a flowchart illustrating a method of generating a roll map ofan electrode coating process according to another embodiment.

FIG. 5 is a schematic diagram illustrating a system for generating aroll map of an electrode coating process according to anotherembodiment.

FIG. 6 is a schematic diagram of a data visualization device forgenerating a roll map of an electrode coating process according toanother embodiment.

DETAILED DESCRIPTION

Hereinafter, the present invention will be described in detail withreference to the accompanying drawings and several embodiments. Thefollowing embodiments are exemplary and set forth herein to facilitateunderstanding of the present invention. The accompanying drawings arenot drawn to actual sale, and dimensions of some components may beexaggerated to facilitate understanding of the present invention.

Since the present invention can be variously modified and have a varietyof forms, specific embodiments will be illustrated in drawings anddescribed in detail. However, the embodiments are not intended to limitthe present invention to a specific form and encompass all changes,equivalents, and substitutions within the spirit and technical scope ofthe present invention.

FIG. 1 is a schematic diagram illustrating a change in risk rangeaccording to the quality relationship analysis between an electrodeprocess and a final product.

As shown in FIG. 1A, a final product (secondary battery) is manufacturedwith a product (electrode) manufactured in an electrode process. When adefect occurs in the final product, it is necessary to check the historyof manufacturing in some cases in order to find the cause of the defect.However, when there is no information or insufficient information on themanufacturing history of the product in the electrode process, it isdifficult to know which electrode process produced the defective finalproduct. Accordingly, to prevent reoccurrence of the same defect, it isnecessary to include other final products as well as the defectiveproduct in a risk range in which a defect may occur and discard all theproducts in the risk range in some cases.

On the other hand, when there is sufficient information on themanufacturing history of the product in the electrode process, a riskrange may be reduced on the basis of the information as shown in FIG.1B, and the number of favorable products to be discarded may be reducedaccordingly. In particular, an electrode is manufactured through variousprocesses, such as an electrode coating process, a roll pressingprocess, a slitting process, etc. Accordingly, unless the producthistory information of each process is clearly recorded or preserved, itmay be difficult to specify the cause of a defect in the relationshipwith a follow-up process.

Therefore, it is necessary to develop a technology for recordinginformation on product quality or defects in an electrode process,particularly, an electrode coating process which determines the qualityof an electrode, and tracking and analyzing the quality relationshipbetween the electrode process and a follow-up process or a finalproduct.

Also, as described above, there is a limit to directly marking anelectrode coated with electrode slurry with all defect information dueto physical limitations of the electrode space. Further, in some cases,information related to the quality of a non-defective electrode in acoating process may be required for finding the cause of a faultunexpectedly occurring in a subsequent process or a process of using asecondary battery which is a finished product.

Therefore, the present inventors have developed a roll map thatovercomes limitations of the related art and is very effective ininter-process quality relationship analysis by displayingquality-related information as well as defect-related information of anelectrode coating process on a roll map bar having a bar shape whichsimulates an electrode coated with electrode slurry or an insulatingmaterial rather than directly on the electrode.

FIG. 2 is a diagram illustrating a roll map 100 of an electrode coatingprocess according to an embodiment.

The roll map 100 of an electrode coating process includes a roll map bar110 which is displayed in a bar shape by simulating an electrode in aroll-to-roll state and a representation part in which at least one ofquality-related and defect-related data measured in an electrode coatingprocess is visually showed on the roll map bar 110.

The roll map bar 110 simulates the actual electrode that is installedand moved in the roll-to-roll state between an unwinder and a rewinder.The start point and end point of the roll map bar 110 and a part of theroll map bar 110 between the start point and end point are displayed ona screen in synchronization with the path of an electrode which movesbetween the unwinder and the rewinder. For example, when an electroderoll to be coated has a length of 3000 m, the roll map bar 110simulating the electrode is also reduced to a predetermined scale(ratio) and displayed on the screen. Also, when a specific electroderoll is installed between the unwinder and the rewinder, detailedinformation including a lot number, the width of the electrode roll,etc. may be acquired, and thus the roll map bar 110 that is reduced to apredetermined ratio of length and width because not only the length ofthe electrode (roll) but also the width is reduced to the predeterminedscale may be displayed on the screen. Accordingly, the length and widthof the roll map bar 110 correspond to the length and width of anactually moving electrode at the predetermined ratio. Also, when aspecific location in the electrode is indicated by, for example,coordinates that are represented in units of the dimensions of thelength and width of the electrode, the coordinates may also be reducedat the predetermined ratio and displayed on the roll map bar 110. InFIG. 2 , a longitudinal direction dimension (in units of 100 m) 140 ofthe electrode is displayed at predetermined intervals in thelongitudinal direction of the roll map bar 110.

Further, the roll map bar 110 is synchronized with the electrode (path)which actually moves between the unwinder and the rewinder while beingcoated or the electrode movement. Accordingly, even when coating isperformed to adjust coating conditions before actual coating isperformed, the coating status of a corresponding part may be displayedon the roll map bar 110. Therefore, the roll map bar 110 may be dividedinto a condition adjustment part A for adjusting coating conditions anda mass-production part B in which actual coating is performed under theadjusted coating conditions.

When the electrode is disconnected in the coating process and there is asection (a disconnected section 122) for connecting the disconnectedelectrodes, the disconnected section 122 may be displayed on the rollmap bar 110.

While the roll map bar 110 represents an electrode path insynchronization with actual electrode movement, the representation partshown on the roll map bar 110 is a part in which quality-related ordefect-related data of an actual electrode coating process is displayed.In this specification, “quality-related or defect-related data of anelectrode coating process” includes not only data on actual defects,such as an appearance defect, an insulation defect, a mismatch between acoated electrode part and a non-coated electrode part, etc., but alsodata of normal ranges, such as loading amount data, dimension and widthdata, etc., data on an electrode location for sample examination, etc.In other words, as long as there is a measuring instrument for measuringspecific quality in an electrode coating process, all data measured bythe measuring instrument may be displayed on a roll map in theory.Accordingly, in this specification “quality-related or defect-relateddata of an electrode coating process” includes normal data as well asdata on defects and additionally indicates all quality-related data thatmay be quantified or visually displayed on a roll map.

In this specification, “visually displayed” data or “visualization” ofdata may be defined as visually recognizing and representingcorresponding data on a roll map bar having a bar shape which simulatesan electrode using at least one of shape, color, size, pattern,contrast, transparency, various symbols, numbers, letters, and othervisually recognizable things. Also, not only a part displayed in ashape, color, etc. at a specific location on a roll map but also a partvisually displayed in a shape, color, etc. in a specific range or theentire range of a roll map bar may be defined as the “representationpart in which data is visually showed.” For example, when data on anelectrode slurry loading amount is represented in a color or the likeall over a roll map bar, a representation part may not be a part of theroll map bar but may be the entire roll map bar. Although eachrepresentation part is hatched for distinguishment in the drawings ofthis specification, the corresponding representation part may be coloredfor distinguishment.

Since the roll map bar 110 simulates an electrode being actually coated,it is preferable to display detailed information on an actual electrode(roll) installed between the unwinder and the rewinder together with theroll map bar 110.

At the upper end of the screen of FIG. 2 , detailed data 130 on aproduction line, a process, production equipment, a side of theelectrode, etc. is displayed in addition to the lot number of anelectrode roll. From the detailed data 130, not only the previousprocess history information of an electrode roll provided in a coatingprocess but also additional coating-related information, such as inwhich line or equipment the corresponding coating process was performed,whether a single side or double sides of the electrode have been coated,etc., or information on the details of the electrode roll may beacquired. When a keyword relating to the line, the process, theproduction equipment, or the side of the electrode is input by clickingan inquiry button displayed on the upper right side of the screen, theroll map 100 or the roll map bar 110 corresponding to the menu may bedisplayed on the screen.

At least one of quality-related or defect-related data 120 displayed onthe roll map bar 110 may be measured by a predetermined measuringinstrument or an operator. In other words, data acquired in an electrodecoating process by a measuring instrument, such as a loading amountthickness measuring instrument, an appearance inspection device, etc.may be displayed on the roll map bar 110. In addition, a defect detectedby the operator with the naked eye in the electrode coating process, thesection 122 in which the electrode is cut and manually connected, etc.may also be manually input to a server or the like and displayed asspecific data on the roll map bar 110. Like this, not only dataautomatically acquired by a measuring instrument but alsoquality-related or defect-related data acquired by an operator in anelectrode coating production line can be displayed on the roll map 100,and thus a quality relationship can be traced more easily.

Quality-related or defect-related data that may be displayed on the rollmap bar 110 according to an embodiment or acquired from the roll mapwill now be described in detail with reference to FIG. 2 . Thequality-related or defect-related data 120 displayed on the roll map bar110 of FIG. 2 is 1) data 125 on at least one of electrode dimensions andwidth, 2) data 126 on a mismatch between a coated electrode part and anon-coated electrode part, 3) electrode slurry loading amount data 121,4) electrode appearance defect data 123, 5) the data 122 on the locationof a disconnected section or inter-electrode connection, 6) data 129 onthe location of a sample examination unit, 7) data on the location of anelectrode discard section, 8) data 124 and 127 on insulating quality ordefects in an insulating material coating process performed afterelectrode slurry coating, and 9) other defect data 128.

To display the quality-related or defect-related data 120, data namesrepresented in a specific color, form, shape, etc. may be simplydisplayed at the upper end of the screen. Actual data displayed in sucha color, form, and shape may be displayed at a specific location on theroll map bar 110 or over a specific range of the roll map bar 110.

Specifically, when the dimensions or width of an electrode deviates froma normal range, the data 125 on this may be displayed on the roll map.

Also, the data 126 on a mismatch in which the widths of a coated partand a non-coated part deviate from a set range may also be displayed onthe roll map.

Also, the data 121 on an electrode slurry loading amount that is normal121 a, insufficient 121 b, or excessive 121 c may be displayed withhatch marks over a specific range on the roll map bar 110.

Also, the electrode appearance defects 123 are displayed as circles atspecific spots on the roll map bar 110.

Also, the disconnected section 122 at which the disconnected electrodeis connected with a coupling member, such as polyethylene terephthalate(PET), is displayed at the left end of the roll map bar 110. The case ofdirectly connecting electrodes without any coupling member may bedisplayed on the roll map. When the operator performs such electrodeconnection, the operator may directly input data or location informationof the corresponding section to the server and display the data orlocation information on the roll map 100.

Also, the electrode parts 129 provided for sample examination may alsobe displayed on the roll map 100.

Although not shown in FIG. 2 , data on a discarded section of theelectrode may be displayed on the roll map. For example, the outermostsection of the coated electrode is cut off and discarded. The roll map100 may display information on even such a discarded section.

Since not only electrode slurry coating but also coating the boundarybetween the coated part and the non-coated part with an insulatingmaterial is performed in the electrode coating process, the data oninsulating defects 127 or insulating appearance defects 124 may bedisplayed on the roll map bar 110. In this regard, an “electrode coatingprocess” of this specification includes “coating of an insulatingmaterial” in addition to “coating of electrode slurry.”

Also, the data 128 on defects other than appearance defects orinsulating defects may be displayed on the roll map bar 110. The data128 on other defects corresponds to other defects when displayed in theelectrode coating process. However, when the other defects turn out tobe specific defects after the coating is completed or in a follow-upprocess, the other defects may be changed to the specific defects anddisplayed on the roll map 100. When any defect occurs in a follow-upprocess, the other defect data may be important data for finding thecause of the defect.

When the quality-related or defect-related data 120 is displayed on theroll map bar 110 synchronized with an electrode path as described above,it is possible to recognize quality-related history information of anelectrode coating process.

Also, as shown in FIG. 2 , when a specific range of the roll map bar 110on the screen is specified and clicked, at least one of thequality-related or defect-related data 120 of a range on the electrodecorresponding to the specific range may be visually displayed on thescreen separately from the roll map bar 110. When the mismatch section126 of the roll map bar in FIG. 2 is clicked, detailed information 150on the mismatch 126, the loading amount 121 in the mismatch section, andthe width-related information 125 may be checked on the left side underthe roll map bar 110. Such a range may be specified by clicking whilemoving an inquiry bar, and a defective section may be specified inlength units (e.g., 1 m) to check detailed data of the correspondingrange. Although a loading amount for only one side of the electrode isshown above the upper roll map bar 110, the roll map may be configuredto check the loading amounts of the top surface and the bottom surfaceof the electrode in the detailed information.

Meanwhile, when the electrode appearance defect data 123 on the roll mapbar 110 is clicked, an appearance image 163 of the electrodephotographed by the appearance inspection device may be visuallydisplayed on the screen separately from the roll map bar. The appearancedefect image 163 shown by clicking the appearance defect data 123 isenlarged and displayed on the right side under the roll map bar. Also,when the appearance image is displayed, the detailed information 162including the location coordinates of an appearance defect imaged by theappearance inspection device may also be displayed together with theappearance image 163 on the screen. The detailed information 162 mayinclude information on the lot identifier (ID) of the electrode, whichis the target of the roll map bar, the ID of the appearance inspectiondevice, the type of appearance defect, a lane of the electrode, thelocation coordinates, the grade, the diameter, and the date ofoccurrence of the appearance defect. Since the information is stored inthe server, the information may be called from the server and separatelydisplayed on the screen by clicking an appearance defect image on theroll map bar. In this way, according to the present embodiment,appearance information 160 including the appearance image 163 and thedetailed information 162 on appearance defects may be separatelydisplayed on the screen.

The roll map 100 of the embodiment shown in FIG. 2 is displayed on thescreen for each lane L1 and L2 on the electrode where the electrodeslurry is coated. Since the coated part of the electrode which is coatedwith electrode slurry may be formed at certain intervals or in a certainpattern on electrode foil, the roll map 100 may be generated for each ofthe lanes L1 and L2 coated with electrode slurry. FIG. 2 shows the rollmap of the two lanes L1 and L2.

FIG. 3 is a diagram illustrating a roll map 200 of an electrode coatingprocess according to another embodiment.

The roll map 200 of the present embodiment is the roll map of adouble-sided electrode having a top surface T and a bottom surface Bboth coated with electrode slurry. the roll map 200 for the top surfaceT of the double-sided electrode and the roll map 200 for the bottomsurface B are displayed on the same screen, in an upper part and lowerpart of the screen, respectively. Accordingly, data 220 on quality ordefects related to coating with electrode slurry or an insulatingmaterial applied onto both surfaces can be clearly understood incomparison with each other.

Also, in the roll map 200 of the present embodiment, data 250 on theinput status of electrode foil, the electrode slurry, and the insulatingmaterial input to the electrode coating process and data 260 on theloading amount of the electrode slurry input to the electrode coatingprocess is visually displayed on the screen in parallel with the rollmap 200 in the longitudinal direction of the roll map.

At the upper end of the screen, the electrode foil, the electrodeslurry, and the insulating material input to the electrode coatingprocess are displayed. Long bars representing the electrode foil, theelectrode slurry, and the insulating material extend in the longitudinaldirection of the roll map 200 in parallel with the roll map from theleft side to the right side on the screen. Accordingly, a part to whichthe bars do not extend represents that the corresponding material (theelectrode foil, the electrode slurry, or the insulating material) is notinput to the electrode coating process. Consequently, from the data 250on such input material status, it is possible to see in which section aspecific material has been introduced in the electrode coating process.

In the present embodiment, data 221 on the loading amount of theelectrode slurry input to the electrode coating process is displayed onthe roll map in the longitudinal direction of the roll map. However,separately from the roll map, the data 221 is displayed under the rollmap bars in the longitudinal direction of the roll map in parallel withthe roll map. Since the data shows a distribution of the loading amount260 according to the length of the electrode like a graph, it ispossible to easily see information on an excessive or insufficientloading amount. Also, the value of a loading amount may be displayedtogether as necessary, and thus it is possible to intuitively seeinformation on a loading amount.

At the upper end of the screen of FIG. 3 , detailed data 230 on themodel of an electrode roll, a process, production equipment, a lanenumber, a side of the electrode, etc. is displayed in addition to thelot number of the electrode roll. According to the present embodiment,in addition to the detailed data 230, a menu 231 relating to a inputstatus (Input), the electrode (roll map) produced by input material(Output) and a measured value, a menu 232 relating to a selection of aside of the electrode, a menu 233 relating to screen zoom-in orzoom-out, and a menu 234 relating to other measured value options aredisplayed at the upper end of the screen. By selecting such menus,various types of roll maps 200 fit for the corresponding menus may bedisplayed on the screen.

At the upper end of the roll map screen of the present embodiment, thenames of data relating to loading amounts and defects, data namesrelating to surface defects, and data names relating to sampleexamination are separately displayed to be easily distinguished. Withsuch data names, the types of data displayed above the roll map bars maybe simply distinguished.

On the roll map bars of FIG. 3 , 1) data 225 on at least one ofelectrode dimensions and width, 2) data 226 on a mismatch between acoated electrode part and a non-coated electrode part, 3) the electrodeslurry loading amount data 221, 4) electrode appearance defect data 223,5) data 222 a or 222 b on the location of a disconnected section orinter-electrode connection, 6) data 229 on the location of a sampleexamination unit, 7) data 222 c on an electrode discard section, 8) data227 on insulating quality or defects in an insulating material coatingprocess performed after electrode slurry coating, and 9) other defectdata are displayed.

When the dimensions or width of the electrode deviates from a normalrange, the data 225 on this is displayed in a quadrangle on the rollmap, and the data 226 on the mismatch is also displayed in a thickquadrangle.

According to the present embodiment, the data 221 on an electrode slurryloading amount is displayed in more detail. In other words, the data 221is displayed as a normal case 221 a, an insufficient case 221 b or 221c, or an excessive case 221 d or 221 e over a specific range on the rollmap bar 210.

An electrode appearance defect is displayed as a circle, a black circle,or a black bar 223 at a specific spot on the roll map bars 210. In thepresent embodiment, appearance defects 223 are subdivided into pinholes,lines, and craters and displayed in different shapes on the roll map200.

Also, the disconnected section 222 a at which the disconnected electrodeis connected with a coupling member, such as PET, and theinter-electrode connection section 222 b may be displayed, and a PETconnection section is displayed on the roll map in FIG. 3 .

Further, an automatic mark section 228 a which is a defective sectionmeasured and marked by, for example, a measuring instrument and a manualmark section 228 b which is manually input for indication by an operatorare displayed on the roll map. Since a start portion S and an endportion E of each section are displayed on the roll map, it is possibleto see information on the length, the start point, and the end point ofa corresponding section.

In addition, the outermost discard section 222 c is displayed as ahatched portion on the roll map bars 210.

In the present embodiment, the electrode part 229 provided for sampleexamination is also subdivided into a self-test and a quality assurance(QA) test and displayed on the roll map bars 210.

The data (graph) 260 on the loading amount displayed in parallel withthe roll map bars at the lower end of the embodiment of FIG. 3 shows apart 261 having an excessive loading amount and a part (the PETconnection section) 262 not loaded with electrode slurry, whichcorrespond to marks on the roll map bars 210 above the data 260.

As described above, the roll map 200 according to the present embodimentmay display quality-related or defect-related data in a specific shape,color, etc. on a roll map bar synchronized with an electrode path andsimultaneously display the current status of a material input to acoating process, important data of a loading amount, and detailed dataof each point on the same roll map bar or the same screen. Accordingly,it is possible to see quality-related history information in anelectrode coating process easily at a glance.

A method of generating a roll map of an electrode coating process forgenerating the roll map will be described below.

FIG. 4 is a flowchart illustrating a method of generating a roll map ofan electrode coating process according to an embodiment, and FIG. 5 is aschematic diagram illustrating a system for generating a roll map of anelectrode coating process according to another embodiment.

An example of the method of generating a roll map of an electrodecoating process includes an operation (operation (b) of FIG. 4 ) ofacquiring at least one of quality-related data and defect-related dataof an electrode coating process by inspecting the electrode coatingprocess of coating an electrode moved between an unwinder and a rewinderin a roll-to-roll state with electrode slurry, an operation (operation(c) of FIG. 4 ) of transmitting the acquired data to a server togetherwith data on a location in the electrode at which the data is acquired;and an operation (operation (d) of FIG. 4 ) in which a data systeminterconnecting with the server displays a roll map bar having a barshape which simulates the electrode in the roll-to-roll state insynchronization with movement of the electrode between the unwinder andthe rewinder and visually displays the at least one of thequality-related and defect-related data at a certain location on theroll map bar corresponding to the data on the location in the electrode.

Before the electrode coating process, it is preferable to precede anelectrode roll information registration operation (operation (a) of FIG.4 ) of inputting detailed data including the lot number of an electroderoll to the server when the electrode roll is installed in theroll-to-roll state between the unwinder and the rewinder. Referring toFIG. 5 , when the electrode roll is introduced into an unwinder 10 orinstalled between the unwinder 10 and a rewinder 20, detailed dataincluding the lot number of the electrode roll may be input to a server300. This data may be manually input by an operator at, for example, aplace where the unwinder 10 is installed or automatically input to theserver 300 by scanning an indicator, such as a barcode or the likeinstalled on the electrode roll, for checking detailed data in a processin which the electrode roll is automatically moved to the unwinder 10 bya robot or the like. When information on the electrode roll isregistered in the server 300, detailed data, such as the lot number, aprocess, equipment, etc. on the electrode (roll) may be called from theserver and displayed on the screen together with the generated roll mapbar. Also, the specifications of the length and width of the electroderoll may be acquired from the detailed data of the electrode roll.Accordingly, when a roll map bar is generated by a data processingsystem, such as a manufacturing execution system (MES) or the like, theshape and size of the roll map bar may be determined at a certain scalewhich is proportional to the length and width of the electrode. In otherwords, the roll map bar may be displayed in a shape and size fit for thelength and width of the electrode roll according to a conversion scalestored in the MES or the like. The data processing system is a system(including hardware or software) that performs input, processing,output, communication, etc. to perform a series of manipulations ondata. An example of such a data processing system may be the MES asdescribed above.

Meanwhile, to generate the roll map, it is necessary to acquirequality-related or defect-related data of an electrode coating processand data on a location in an electrode at which the data is acquired.

The quality-related or defect-related data may be obtained by inspectingan electrode 1 moving in the electrode coating process. As shown in FIG.5 , one side or both sides of the electrode 1 are coated by an electrodeslurry coater 40 and an insulating material coater 50 while movingbetween the unwinder 10 and the rewinder 20.

When there is a foreign material or fault in the electrode 1 beforecoating, the corresponding portion may be cut off and discarded to adefect removal port 30, and the electrode and another electrode may bedirectly connected or connected using a coupling member such as PET orthe like. Even when a fault occurs on the electrode or the electrode isdisconnected due to excessive tension after coating, the electrode maybe connected. Also, outermost portions corresponding to the start pointand end point of the electrode may not be of uniform quality and thusare cut off and discarded. Such an electrode connection section ordiscard section may be automatically or manually measured. For example,when the operator connects a disconnected section, the location of thesection may be directly input to the server or data processing system ormay be input to an additional input device (not shown) which maycommunicate with the server 300 and the like and installed in anelectrode coating line. Alternatively, the operator may directly attachan indicator tag to the disconnected section or connection section onthe electrode.

After coating, the electrode 1 is inspected by a predetermined measuringinstrument 60 installed in the electrode coating process line. Forexample, measuring instruments such as an electrode slurry loadingamount measuring instrument 61, a dimension and width measuringinstrument 62, and an appearance inspection device 63 may be installedin the line. The electrode slurry loading amount measuring instrument 61may employ a non-contact thickness measurement sensor, such as anultrasonic sensor, a displacement sensor, a laser sensor, a confocalthickness sensor, etc. Since the thickness of electrode foil is known, aslurry loading amount may be measured by analyzing the wavelength ofreflected light of light emitted from, for example, the confocalthickness sensor and calculating the distance (thickness) between thesensor and the electrode.

The dimension and width measuring instrument 62 may employ a type ofvision measuring instrument for measuring an electrode width, the widthsof a coated part and non-coated part, etc. by imaging or scanning theappearance of the electrode being coated. When the widths of the coatedpart and non-coated part are acquired, whether there is a mismatchbetween the coated part and non-coated part may be determined as shownon the lower left side in FIG. 2 .

The appearance inspection device 63 may acquire an appearance image asshown on the lower right side in FIG. 2 by imaging the appearance of theelectrode. From this, data on appearance defects, such as pinholes,lines, and crater shapes, may be obtained, and data on insulatingappearances or insulating defects may also be acquired. The appearanceinspection device 63 may include a sensor, for example, a color sensor,for determining the color of the electrode. The color sensor may detecta part, for example, a PET coupling member, having a different colorthan the electrode.

The above measuring instruments are exemplary for the description. Themeasuring instruments are not limited to any type as long asquality-related or defect-related data of an electrode coating processcan be acquired.

Meanwhile, the fore-end part of the electrode from which electrodecoating is started is coated by the electrode slurry coater or the likewith coating conditions, such as a loading amount and the like, beingadjusted. In this part, a loading amount may be changed. Accordingly,data on such a condition adjustment section may also be acquired by themeasuring instrument 60, and the data may be displayed on the roll mapbar.

When quality-related or defect-related data is acquired by variousmeasuring instruments or the operator as described above, the data istransmitted to the server 300. Referring to FIG. 6 , various measuringinstruments 60, such as the electrode slurry coater 61, the insulatingmaterial coater 62, the appearance inspection device 63, etc., areconnected to the server 300, and thus data on coating conditions and thelike of the coating process may be stored in the server 300. Also, dataacquired by the various measuring instruments 60 may be stored in theserver 300. Further, data manually input by the operator through anadditional input device (not shown) may be stored in the server 300.

To display the quality-related or defect-related data on the roll map,it is necessary to specify data on a location in the electrode at whichthe data is acquired. In other words, assuming that the roll map bar isa coordinate system including two coordinate axes in the longitudinaldirection and width direction, in order to input (display) specific data(related to quality of defects) at a specific location (coordinates) inthe coordinate system, it is necessary to acquire location data of theelectrode which is a base for extracting the location (coordinates).

As one embodiment, location data based on the longitudinal direction ofthe electrode may be detected by an encoder installed in the unwinder 10or the rewinder 20. As shown in FIG. 5 , encoders 11 and 21 areinstalled on the unwinder 10 or the rewinder 20. For convenience ofillustration, the encoders 11 and 21 are shown to be installed outsidethe unwinder 10 or the rewinder 20, but the encoders may be embedded inthe unwinder 10 and the like. In general, the encoders 11 and 21 may beinstalled in a motor drive unit which drives the unwinder 10 or therewinder 20 and may detect an electrode movement distance according tothe number of motor rotations. Accordingly, when the electrode movesbetween the unwinder 10 and the rewinder 20, the movement distance canbe detected by the encoders 11 and 21. For example, when the electrode 1is disconnected, the disconnected electrode is removed at the defectremoval port 30, and the connection section is input to the serverthrough the input device by the operator, the encoder 11 of the unwinderdetects the disconnected location (a longitudinal distance) of theelectrode, and data (the distance data between the start point and endpoint of the cut) on the location of the electrode connection sectionmay be input together. Otherwise, when the electrode is disconnectedafter coating and thus is connected with a coupling member, such as PETor the like, the electrode may be moved and come under the appearanceinspection device 63, and then the appearance inspection device 63 mayrecognize the coupling member. In this case, when the encoder 21 of therewinder 20 is allowed to interconnect with the appearance inspectiondevice 63 or perform data communication with the appearance inspectiondevice 63 in a wired or wireless manner, the appearance inspectiondevice 63 may acquire data (the longitudinal location data) on thecoupling member section detected by the encoder 21 of the rewinder 20.Accordingly, the appearance inspection device 63 may acquire data on acoupling member image acquired by the inspection device and the locationdata of the coupling member section together. As shown in FIG. 5 , theencoder 21 of the rewinder 20 is connected to the loading amountthickness measuring instrument 61 and the dimension and width measuringinstrument 62 in addition to the appearance inspection device 63 andthus may acquire longitudinal location data of the electrode whoseloading amount has been measured and longitudinal location data of theelectrode whose dimensions or width has been measured together with theloading amount and dimension/width information. As necessary, theencoder 11 of the unwinder 10 may also be connected to the variousmeasuring instruments 60.

Meanwhile, location data based on the width direction of the electrodemay be detected by the certain measuring instrument 60 that inspects theelectrode coating process. The measuring instrument 60, such as theloading amount thickness measuring instrument or the like, shown in FIG.5 may be installed to be plural in number in the width direction of theelectrode or installed to be movable in the width direction of theelectrode. Accordingly, the measuring instruments 60 may acquirequality-related or defect-related data (e.g., loading amount data orappearance defect data) at predetermined intervals from each point inthe width direction of the electrode. Also, data on a widthwise locationat which the corresponding data is acquired may be acquired by themeasuring instrument 60. Each of the measuring instruments 60 isconnected to the encoder 11 or 21 of the unwinder 10 or rewinder 20 fordata communication and thus may acquire all quality-related ordefect-related data and data on the longitudinal location and widthwiselocation in the electrode at which the data is acquired. Such data istransmitted to the server 300 connected to the measuring instruments andstored in the server (see FIG. 5 ).

As shown in FIG. 5 , the data stored in the server 300 is transmitted toa data processing system such as an MES 400. The MES 400 indicatessoftware that performs production management in the manufacturing fieldto reduce costs, control quality, and perform low-cost high-efficiencyproduction on the basis of factory data or a data processing systemincluding the software. In the embodiment shown in FIG. 5 , a database410 is installed in the MES 400. However, the database 410 may beseparately provided from the MES 400. The database 410 stores variousdata related to product production in the factory. With regard to rollmap generation, quality-related data in the electrode coating process isincluded in the database 410. The quality-related data may be, forexample, standard information on a normal range or optimization range ofa loading amount or the like, information on an allowable range on thesize or width of appearance defects and a mismatch tolerance range, etc.A quality management unit or central processing unit 420 installed inthe MES 400 may compare the data received from the server 300 withquality data stored in the database 410. Quality data of a loadingamount or coated part and non-coated part widths is compared withmeasurement data acquired from a measuring instrument to determinewhether the loading amount is normal, insufficient, or excessive orwhether the loading amount is within the mismatch tolerance range.Alternatively, it is determined through the comparison whether the sizeor width of an appearance defect is within the allowable range and thelike. In other words, the quality management unit or central processingunit 420 of the MES 400 may compare data acquired by a measuringinstrument and the like with quality data of the database 410 todetermine whether the acquired data deviates from normal quality data.When the acquired data deviates from the normal quality data, a part ofthe roll map bar corresponding to the acquired data may be marked in,for example, another color or shape to be visually distinguished fromother parts, which will be described below.

Meanwhile, the quality-related or defect-related data received from theserver 300 and location data of the electrode or data of which thefavorableness or defect is determined in comparison with the qualitydata of the database is visualized and displayed as a roll map on adisplay unit 500 by a data visualization device 430 installed in the MES400.

FIG. 6 is a schematic diagram of the data visualization device 430 forgenerating a roll map of an electrode coating process.

As shown in the drawing, the data visualization device 430 includes anacquired data input unit 431, a roll map bar coordinate determinationunit 432, and an image generation unit 433.

First, the acquired data input unit 431 receives data from the server orthe quality management unit or central processing unit 420.

The roll map bar coordinate determination unit 432 may define avisualization area in which a roll map will be formed and define pixelcoordinate values for each data element of the acquired source data inthe visualization area. When data on specifications, such as the lotnumber, the length, the width, etc., of the electrode roll is input tothe server 300 and the MES 400 through registration of electrode rollinformation, the roll map bar coordinate determination unit 432 maycalculate and determine the visualization area of the roll map baraccording to a certain conversion scale from the data on the size of theelectrode. Otherwise, the visualization area of the roll map bar may becalculated and determined according to a certain conversion scale fromthe above-described data on the longitudinal and widthwise location inthe electrode.

The coordinate determination unit 432 may map the acquiredquality-related or defect-related data to (widthwise and longitudinal)location data of the electrode and allocate the mapped data to thevisualization area (the roll map bar) according to pixel coordinates.

The image generation unit 433 may represent the mapped data elementallocated to each pair of pixel coordinates in the visualization area asat least one legend. Legends are various shapes, such as a circle, aquadrangle, a triangle, etc., displayed in a visualization area or theshapes or the like given a color. Accordingly, various quality-relatedor defect-related data is visually displayed at pixel coordinates(coordinates on the roll map bar) corresponding to each piece oflocation data of the actual electrode in the visualization area, whichis called the roll map bar, in a form, a shape, and a color specifiedfor each piece of data and implemented on the roll map bar by the imagegeneration unit 433 such that a roll map can be generated.

Also, the quality-related or defect-related data and the data on alocation at which the data is acquired is stored in the server 300.Accordingly, the central processing unit 420 and the data visualizationdevice 430 may be configured to load the data corresponding to aspecific range of the roll map bar onto the same screen as the roll mapbar 110 as shown in FIG. 2 . As described above, a roll map can beimplemented for each lane of the electrode, a top surface and a bottomsurface, or both sides of the electrode. Otherwise, as described above,data on current status of a material input to the electrode coatingprocess can be received from, for example, the server 300 connected tothe coaters 40 and 50 and displayed together with the roll map, orloading amount data, which is important data, can be separatelyextracted and displayed in parallel with the roll map.

Setting the size of the visualization area or generation of an image bydetecting coordinates of the visualization area may be performed byvarious existing user interfaces or various programs or processing toolsrelating to data allocation-processing-analysis and visualization.Accordingly, the above-described method of generating a roll map is onlyone example, and the present invention is not limited to theabove-described embodiment.

FIG. 5 shows the above-described system 1000 for generating a roll map.As shown in the drawing, the system 1000 for generating a roll map of anelectrode coating process includes: the measuring device 60 whichacquires at least one of quality-related data and defect-related data ofan electrode coating process by inspecting an electrode coating processand transmits the acquired data to a server together with data on alocation in an electrode at which the data is acquired; the server 300which stores the data received from the measuring device; the MES 400generating a roll map which displays, in conjunction with the server300, a roll map bar having a bar shape that simulates an electrode inthe roll-to-roll state in synchronization with movement of the electrodebetween the unwinder 10 and the rewinder 20 and visually displays the atleast one of the quality-related and defect-related data at apredetermined location on the roll map bar corresponding to the data onthe location in the electrode on the basis of the quality-related ordefect-related data received from the server 300 and the data of thelocation in the electrode at which the data is acquired; and the displayunit 500 which is connected to the MES 400 and displays the roll map ona screen. The MES 400 includes the database 410 in which the qualitydata of the electrode coating process is stored, the quality managementunit (central processing unit) 420 which makes a determination onacquired data in comparison with the quality data, and the datavisualization device 430 which visually displays, on the basis of theacquired data, the roll map bar and a representation part that visuallyshows the data on the roll map bar.

As described above, with a roll map, it is possible to visuallyrecognize quality-related or defect-related data of an electrode coatingprocess at a glance with ease. Due to the roll map, even when anelectrode is used for assembly or a battery is manufactured with theelectrode in a follow-up process, it is possible to easily find thecause of a post-assembly fault or defect from the roll map data of thecorresponding electrode as long as the lot number or specificationinformation of the battery or electrode is known. Therefore, it ispossible to carry out inter-process quality relationship analysis withhigh accuracy.

The present invention has been described in detail with reference to thedrawings, embodiments, etc. However, a configuration illustrated indrawings or embodiments described in this specification is only anembodiment of the present invention and does not represent the entiretechnical spirit of the present invention. Therefore, it should beunderstood that various equivalents and modifications capable ofreplacing the embodiment may be present at the time of filing of thepresent application.

DESCRIPTION OF SIGNS

1: electrode

10: unwinder

20: rewinder

30: defect removal port

40: electrode slurry coater

50: insulating material coater

60: measuring instrument (measuring device)

61: electrode slurry loading amount measuring instrument

62: dimension and width measuring instrument

63: appearance inspection device

100: roll map

110: roll map bar

120: quality-related or defect-related data

121: loading amount data

122: disconnected section data

123: appearance defect data

124: insulating appearance data

125: dimension/width data

126: mismatch data

127: insulating defect data

128: other defect data

129: sample examination data

130: detailed data

140: electrode dimension

150: detailed information

160: appearance information

200: roll map

210: roll map bar

220: quality-related or defect-related data

221: loading amount data

222 a: polyethylene terephthalate disconnected section data

222 b: inter-electrode connection data

222 c: outermost discard section data

223: appearance defect data

225: dimension/width data

226: mismatch data

227: appearance insulating defect data

228 a: defect display (automatic) data

228 b: defect display (manual) data

229: sample examination data

230: detailed data

240: electrode dimensions

250: current coating material input status

260: loading amount data (graph)

300: server

400 manufacturing execution system

410: database

420: quality management unit (central processing unit)

430: data visualization device

431: acquired data input unit

432: roll map bar coordinate determination unit

433: image generation unit

500: display unit

1. A roll map of an electrode coating process, comprising: a roll mapbar that is displayed on a screen in synchronization with movement of anelectrode between an unwinder and a rewinder while being coated with anelectrode slurry in a roll-to-roll state, the roll map bar beingdisplayed in a form of a bar by simulating the electrode in theroll-to-roll state; and a representation part configured to visuallyshow at least one of quality-related and defect-related acquired dataassociated with the electrode coating process, the acquired data beingshown on the representation part at a certain location on the roll mapbar corresponding to a location in the electrode at which the data ismeasured.
 2. The roll map of claim 1, wherein a longitudinal dimensionof the electrode is displayed at certain intervals in a longitudinaldirection of the roll map bar.
 3. The roll map of claim 1, whereindetailed data is displayed together with the roll map bar, and whereinthe detailed data includes a lot number of the electrode installedbetween the unwinder and the rewinder in the roll-to-roll state.
 4. Theroll map of claim 1, wherein the acquired data is measured by apredetermined measuring instrument or operator and then displayed. 5.The roll map of claim 1, wherein the acquired data is selected from thegroup consisting of 1) data on electrode dimensions, 2) data on amismatch between a coated electrode part of the electrode and anon-coated electrode part of the electrode, 3) electrode slurry loadingamount data, 4) electrode appearance defect data, 5) data on a locationof a disconnected section of an electrode or inter-electrode connection,6) data on a location of a sample examination unit, 7) data on alocation of an electrode discard section of an electrode, 8) data oninsulating quality or defects in an insulating material coating processperformed after electrode slurry coating, and 9) other defect data. 6.The roll map of claim 1, wherein the roll map bar is configured forhaving a specific range of the roll map bar on the screen specified andclicked such that the acquired data in a range on the electrodecorresponding to the specific range is visually displayed on the screenseparately from the roll map bar.
 7. The roll map of claim 5, whereinthe roll map bar is configured for having the electrode appearancedefect data on the roll map bar is clicked such that an appearance imageof the electrode photographed by an appearance inspection device isvisually displayed on the screen separately from the roll map bar. 8.The roll map of claim 7, wherein, when the appearance image isdisplayed, detailed information including location coordinates of anappearance defect photographed by the appearance inspection device isdisplayed together with the appearance image.
 9. The roll map of claim1, wherein the roll map is displayed on the screen for each lane on theelectrode where the electrode slurry coat the electrode.
 10. The rollmap of claim 1, wherein the electrode is a double-sided electrode androll maps for a top surface and a bottom surface of the double-sidedelectrode are displayed on the same screen.
 11. The roll map of claim 1,wherein at least one of data on an input status of electrode foil, theelectrode slurry, and an insulating material input to the electrodecoating process and data on a loading amount of the electrode slurryinput to the electrode coating process is visually displayed on thescreen in parallel with the roll map in a longitudinal direction of theroll map.
 12. A method of generating a roll map of an electrode coatingprocess, the method comprising: acquiring at least one ofquality-related data and defect-related data from the electrode coatingprocess by inspecting an electrode coating process of coating anelectrode slurry on an electrode that is moved between the unwinder andthe rewinder in a roll-to-roll state; transmitting the acquired data toa server together with data on a location in the electrode at which thedata is acquired; and displaying, by a data processing systeminterconnecting with the server, a roll map bar having a bar shape whichsimulates an electrode in the roll-to-roll state on a screen insynchronization with movement of the electrode between the unwinder andthe rewinder and visually displaying the at least one of thequality-related and defect-related data of the electrode coating processat a certain location on the roll map bar corresponding to the data onthe location in the electrode.
 13. The method of claim 12, furthercomprising, when an electrode roll is installed in the roll-to-rollstate between the unwinder and the rewinder before the electrode coatingprocess, an electrode roll information registration operation ofinputting detailed data including a lot number of the electrode roll tothe server is preceded, wherein the detailed data is displayed on thescreen together with a roll map.
 14. The method of claim 12, wherein theacquired data is acquired by a predetermined measuring instrument or byan operator inspecting the electrode coating process, and wherein theacquired data acquired by the operator is transmitted to the server by amanual input of the operator.
 15. The method of claim 14, wherein thepredetermined measuring instrument is an electrode slurry loading amountmeasuring instrument, a dimension measuring instrument, or an appearanceinspection device.
 16. The method of claim 12, wherein location databased on a longitudinal direction of the electrode is detected by anencoder installed on the unwinder or the rewinder.
 17. The method ofclaim 16, wherein location data based on a width direction of theelectrode is detected by a predetermined measuring instrument whichinspects the electrode coating process.
 18. The method of claim 12,further comprising: comparing the acquired data with quality data storedin a database installed in a data processing system or installed tointerconnect with the data processing system; and marking the acquireddata which is determined to deviate from normal quality data as a resultof the comparison on the roll map bar to be visually distinguished fromother parts.
 19. The method of claim 12, further comprising visuallydisplaying at least one of data on an input status of an electrode foil,the electrode slurry, and an insulating material input to the electrodecoating process and data on a loading amount of the electrode slurryinput to the electrode coating process on the screen in parallel with aroll map in a longitudinal direction of the roll map.
 20. A system forgenerating a roll map of an electrode coating process, the systemcomprising: a measuring device configured to inspect an electrodecoating process, acquire at least one of quality-related data anddefect-related data of the electrode coating process, and transmit theacquired data to a server together with data on a location in anelectrode at which the data is acquired; the server configured to storethe data received from the measuring device; a data processing systemconfigured to interconnect with the server to display a roll map barhaving a bar shape simulating an electrode in a roll-to-roll state insynchronization with movement of the electrode between an unwinder and arewinder, and to generate a role map on the basis of the quality-relatedor defect-related data received from the server and the data on thelocation in the electrode at which the data is acquired, wherein theroll map visually displays the acquired data at a certain location onthe roll map bar corresponding to the data on the location in theelectrode; and a display unit connected to the data processing systemand configured to display the roll map on a screen.